#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include<stdio.h>

int main()
{
    int fd1 = open("./test",O_WRONLY|O_RDONLY);
    int fd2 = open("./test",O_WRONLY|O_RDONLY);
    printf("%d, %d",fd1,fd2);
    
}